Stumbled on this issue while trying to set up my first ever SVN repo through Phabricator. However got it working with the alternate solutions found in Phabrictor documentation itself and online forums(these may be obvious to regular SVN users already).

I see that the Phabricator documentation talks about option-3 above, in general for git or svn. It will be great if the step "Change Client Config" is documented as a mandatory step for SVN at least, as it currently seems to reject URI with the custom port in it. A note in the troubleshooting section may also help. Would you please review/update this part of documentation?